Question 1150825
In this problem, by analysis, we can form a right triangle and by this reason, the
altitude shall be the height and the distance of the building, at a given angle, to the airplane is the hypotenuse. With the given parameters, we can apply the trig function of sine, wherein {{{sin(x)=opposite/hypotenuse}}}
Now by plugging in the values

{{{sin(28)=1200m/h}}}
{{{h=1200m/sin(28)}}}

where {{{h=2556.065m}}}